Pennsylvania Families

Her death record gives her exact birth date as Aug 29, 1831. Her 1900 census said she was born in Aug 1831. Her other censuses all said about 1835.
Her records do not record her county of birth, but just say "Ireland". But her brother James and Thomas' death records both say they were born in Co. Sligo. James was older than Margaret and Thomas was younger, therefore Margaret was probably born in Sligo also. At least that is where I would look first.